'Trumpet' in the Bible

And if they blow but with one trumpet, then the princes, which are heads of the thousands of Israel, shall gather themselves unto thee.

But when you blow the trumpet to assemble the whole congregation, don't use the same sound as you do for sounding an alarm.

At the beginning of the month, during your time of rejoicing at the appointed place, sound the trumpet over your burnt offering, then sacrifice your peace offering, since they are to be your memorial before the LORD your God. I am the LORD your God."